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Re: [ddlm-group] Relationship asmong CIF2, STAR,CIF1 and Python. .

I had thought of the dictionary merging and maintenance as an important 
part of DDLm, but agree that it makes sense to break it out and list it 
separately to ensure it gets proper attention, and I am very, very happy 
with the idea of fully supporting CIF1, especially now that I think I have 
a practical way to do so.  So, adopting John W.'s suggestions the list 
would now be (John W, please correct what I got wrong):

       1.  Accomodate DDLm and dREL; and
       2.  Provide sound tools for dictionary merging and maintenance; and
       3.  Do this in a way that keeps required changes to existing 
archives to a minimum; and
       4.  Do this in a way that allows as much existing CIF software
as possible to continue to operate reliably; and
       5.  To the extent that changes will be needed, provide sound 
mechanisms for existing archives and software dependent on CIF1 syntax
and semantics to continue to fully function in conjunction with and making 
as much use as is practical of the new dictionaries; and
       6.  Subordinate to the above, add new features to CIF that may
encourage broader use and more software support

Regards,
   Herbert

=====================================================
  Herbert J. Bernstein, Professor of Computer Science
    Dowling College, Kramer Science Center, KSC 121
         Idle Hour Blvd, Oakdale, NY, 11769

                  +1-631-244-3035
                  [email protected]
=====================================================

On Sun, 16 Jan 2011, John Westbrook wrote:

> Hi Herbert,
>
> Your list of objectives is consistent with my understanding, and I would
> only add in addition to item 1 that there were some extensions specifically
> to facilitate dictionary merging and maintenance.   Perhaps these are lumped
> into the context of DDLm, but these are in some since separate from the
> methods support.    I believe these changes for merging have little impact on
> syntax issues, but Brian may want to comment on this issue.
>
> I would strengthen item 4 in that I believe the original idea was to fully
> support existing syntax and semantics for archived CIFs.  I think this goal
> has been bent as the conversation has drifted into "improving" the syntax.
>
> John
>
>
> On 1/16/11 7:26 AM, Herbert J. Bernstein wrote:
>>
>>    1.  Accomodate DDLm and dREL; and
>>    2.  Do this in a way that keeps required changes to existing
>> archives to a minimum; and
>>    3.  Do this in a way that allows as much existing CIF software
>> as possible to continue to operate reliably; and
>>    4.  To the extent that changes will be needed in archives and
>> software, provide a clearly understood mechanism for making
>> those changes, with as much support software as possible; and
>>    5.  Subordinate to the above, add new features to CIF that may
>> encourage broader use and more software support
>
> -- 
> ******************************************************************
>   John Westbrook, Ph.D.
>   Rutgers, The State University of New Jersey
>   Department of Chemistry and Chemical Biology
>   610 Taylor Road
>   Piscataway, NJ 08854-8087
>   e-mail: [email protected]
>   Ph:  (732) 445-4290  Fax: (732) 445-4320
> ******************************************************************
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